| Barbara Oil Co | 312-726-5555 | Onefirst National Plz | Chicago | IL | 60606 |
| Clark Oil & Refining Corp Inc | 312-254-6504 | 3947 S Kedzie Ave | Chicago | IL | 60632 |
| E F Houghton & Co | 312-767-6760 | 6600 S Nashville Ave | Chicago | IL | 60638 |
| Ensco Field Services | 312-278-2400 | 2525 N Elston Ave | Chicago | IL | 60647 |
| Enterprise Oil Co | 312-847-6700 | 3200 S Western Ave | Chicago | IL | 60608 |
| Environmental Field Services Inc | 312-384-3320 | 1854 N Besly Ct | Chicago | IL | 60622 |
| Illinois Public Aid Medical Field Services Oak | 312-468-5300 | 159th & Cicero Ave | Chicago | IL | 60628 |
| Leahy-Wolf Co | 312-237-9600 | 1951 Rose St | Franklin Park | IL | 60131 |
| Ridgedale Oil & Gas Co | 312-282-1260 | 6024 W Montrose Ave | Chicago | IL | 60634 |
| Star Oil Co Enterprise | 312-733-4400 | 348 N Bell Ave | Chicago | IL | 60612 |
| Stevdnson Oil Co | 312-651-1000 | 755 E 79th St | Chicago | IL | 60619 |
| Wholesale Oil Co | 312-252-2900 | 4340 W Division St | Chicago | IL | 60651 |
